Refactor civilization evolution and state management

- Enhanced the `civilization_evolution.gd` script to improve population handling and resource allocation during civilization transitions.
- Introduced new functions in `civilization_state.gd` for profile normalization and merging, ensuring consistent population representation across stages.
- Updated `evolution_coordinator.gd` to incorporate budget phases for better tracking of simulation performance.
- Improved `frame_budget.gd` to monitor maximum slice durations and phases during processing.
- Added a new benchmarking tool in `android_benchmark.gd` to measure performance metrics during simulation runs, including frame processing times and throughput.
- Created associated scene and resource files for the benchmarking tool to facilitate testing and performance evaluation.

tests/android_benchmark.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://tests/android_benchmark.gd" id="1"]
+
+[node name="AndroidBenchmark" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1")